Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsPMICsPMIC - voltage reference Shunt Adjustable TO 92 3

TLV431, TLV431A, TLV431B

LOW-VOLTAGE ADJUSTABLE PRECISION SHUNT REGULATOR

SLVS139T − JULY 1996 − REVISED JUNE 2007

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

D Low-Voltage Operation ...V

REF

= 1.24 V

D Adjustable Output Voltage, V

= V

REF

to 6 V

D Reference Voltage Tolerances at 255C

− 0.5% for TLV431B

− 1% for TLV431A

− 1.5% for TLV431

D Typical Temperature Drift

− 4 mV (05C to 705C)

− 6 mV (–405C to 855C)

− 11 mV (–405C to 1255C)

D Low Operational Cathode Current . . .

80 µA Typ

D 0.25-Ω Typical Output Impedance

D Ultra-Small SC-70 Package Offers 40%

Smaller Footprint Than SOT-23-3

D See TLVH431 and TLVH432 for

− Wider V

(1.24 V to 18 V) and I

(80 mA)

− Additional SOT-89 Package

− Multiple Pinouts for SOT-23-3 and SOT-89

Packages

REF

ANODE

CATHODE

LP (TO-92/TO-226) PACKAGE

(TOP VIEW)

NC − No internal connection

* For TLV431, TLV431A: NC − No internal connection

* For TLV431B: Pin 2 is attached to Substrate and

must be connected to ANODE or

left open.

DBV (SOT-23-5) PACKAGE

(TOP VIEW)

CATHODE

ANODE

REF

DBZ (SOT-23-3) PACKAGE

(TOP VIEW)

REF

CATHODE

ANODE

D (SOIC) PACKAGE

(TOP VIEW)

REF

ANODE

CATHODE

ANODE

DCK (SC-70) PACKAGE

(TOP VIEW)

CATHODE

REF

ANODE

NC − No internal connection

PK (SOT-89) PACKAGE

(TOP VIEW)

REF

CATHODE

ANODEANODE

description/ordering information

The TLV431 is a low-voltage 3-terminal adjustable voltage reference with specified thermal stability over

applicable industrial and commercial temperature ranges. Output voltage can be set to any value between V

REF

(1.24 V) and 6 V with two external resistors (see Figure 2). These devices operate from a lower voltage

(1.24 V) than the widely used TL431 and TL1431 shunt-regulator references.

When used with an optocoupler, the TLV431 is an ideal voltage reference in isolated feedback circuits for 3-V

to 3.3-V switching-mode power supplies. These devices have a typical output impedance of 0.25 Ω. Active

output circuitry provides a very sharp turn-on characteristic, making them excellent replacements for

low-voltage Zener diodes in many applications, including on-board regulation and adjustable power supplies.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

Summary of content (42 pages)

PAGE 1
TLV431, TLV431A, TLV431B LOW-VOLTAGE ADJUSTABLE PRECISION SHUNT REGULATOR SLVS139T − JULY 1996 − REVISED JUNE 2007 D Low-Voltage Operation . . . VREF = 1.24 V D Adjustable Output Voltage, VO = VREF to 6 V D Reference Voltage Tolerances at 255C D D Low Operational Cathode Current . . . 80 µA Typ D 0.25-Ω Typical Output Impedance D Ultra-Small SC-70 Package Offers 40% − 0.5% for TLV431B − 1% for TLV431A − 1.
PAGE 2
TLV431, TLV431A, TLV431B LOW-VOLTAGE ADJUSTABLE PRECISION SHUNT REGULATOR SLVS139T − JULY 1996 − REVISED JUNE 2007 ORDERING INFORMATION TJ 255C VREF TOLERANCE SC 70 (DCK) SC-70 SOT 23 5 (DBV) SOT-23-5 0.5% SOT 23 3 (DBZ) SOT-23-3 SOT-89 (PK) TO 92 (LP) TO-92 0°C to 70°C SOT 23 5 (DBV) SOT-23-5 1% SOT-23-3 (DBZ) TO 92 (LP) TO-92 SOT 23 5 (DBV) SOT-23-5 1.
PAGE 3
TLV431, TLV431A, TLV431B LOW-VOLTAGE ADJUSTABLE PRECISION SHUNT REGULATOR SLVS139T − JULY 1996 − REVISED JUNE 2007 ORDERING INFORMATION (continued) TJ 255C VREF TOLERANCE TLV431BIDCKR Reel of 250 TLV431BIDCKT Reel of 3000 TLV431BIDBVR Reel of 250 TLV431BIDBVT Reel of 3000 TLV431BIDBZR Reel of 250 TLV431BIDBZT Bulk of 1000 TLV431BILP Reel of 2000 TLV431BILPR Tube of 75 TLV431AID Reel of 2500 TLV431AIDR Reel of 3000 TLV431AIDBVR Reel of 250 TLV431AIDBVT SOT-23-3 (DBZ) Reel of 3000
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TLV431, TLV431A, TLV431B LOW-VOLTAGE ADJUSTABLE PRECISION SHUNT REGULATOR SLVS139T − JULY 1996 − REVISED JUNE 2007 logic block diagram CATHODE REF + − VREF = 1.
PAGE 5
TLV431, TLV431A, TLV431B LOW-VOLTAGE ADJUSTABLE PRECISION SHUNT REGULATOR SLVS139T − JULY 1996 − REVISED JUNE 2007 absolute maximum ratings over operating free-air temperature range (unless otherwise noted)† Cathode voltage, VKA (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V Continuous cathode current range, IK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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TLV431, TLV431A, TLV431B LOW-VOLTAGE ADJUSTABLE PRECISION SHUNT REGULATOR SLVS139T − JULY 1996 − REVISED JUNE 2007 TLV431 electrical characteristics at 25°C free-air temperature (unless otherwise noted) TLV431 PARAMETER TEST CONDITIONS TA = 25°C VREF VKA = VREF, IK = 10 mA Reference voltage TA = full range (see Note 4 and Figure 1) VREF(dev) A VKA = VREF, IK = 10 mA (see Note 4 and Figure 1) TYP MAX 1.222 1.24 1.258 TLV431C 1.21 1.27 TLV431I 1.202 1.278 TLV431Q 1.
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TLV431, TLV431A, TLV431B LOW-VOLTAGE ADJUSTABLE PRECISION SHUNT REGULATOR SLVS139T − JULY 1996 − REVISED JUNE 2007 TLV431A electrical characteristics at 25°C free-air temperature (unless otherwise noted) TLV431A PARAMETER TEST CONDITIONS TA = 25°C VREF VKA = VREF, IK = 10 mA Reference voltage TA = full range (see Note 3 and Figure 1) VREF(dev) A VKA = VREF, IK = 10 mA (see Note 3 and Figure 1) TYP MAX 1.228 1.24 1.252 TLV431AC 1.221 1.259 TLV431AI 1.215 1.265 TLV431AQ 1.
PAGE 8
TLV431, TLV431A, TLV431B LOW-VOLTAGE ADJUSTABLE PRECISION SHUNT REGULATOR SLVS139T − JULY 1996 − REVISED JUNE 2007 TLV431B electrical characteristics at 25°C free-air temperature (unless otherwise noted) TLV431B PARAMETER TEST CONDITIONS TA = 25°C VREF VKA = VREF, IK = 10 mA Reference voltage TA = full range (see Note 3 and Figure 1) VREF(dev) A VKA = VREF, IK = 10 mA (see Note 3 and Figure 1) TYP MAX 1.234 1.24 1.246 TLV431BC 1.227 1.253 TLV431BI 1.224 1.259 TLV431BQ 1.
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TLV431, TLV431A, TLV431B LOW-VOLTAGE ADJUSTABLE PRECISION SHUNT REGULATOR SLVS139T − JULY 1996 − REVISED JUNE 2007 PARAMETER MEASUREMENT INFORMATION Input Input VO VO IK IK R1 R2 VREF Figure 1. Test Circuit for VKA = VREF, VO = VKA = VREF Input Iref VREF Figure 2. Test Circuit for VKA > VREF, VO = VKA = VREF × (1 + R1/R2) + Iref × R1 VO IK(off) Figure 3.
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TLV431, TLV431A, TLV431B LOW-VOLTAGE ADJUSTABLE PRECISION SHUNT REGULATOR SLVS139T − JULY 1996 − REVISED JUNE 2007 PARAMETER MEASUREMENT INFORMATION† REFERENCE VOLTAGE vs JUNCTION TEMPERATURE 1.254 IK = 10 mA V ref − Reference Voltage − V 1.252 1.250 1.248 1.246 1.244 1.242 1.240 1.
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TLV431, TLV431A, TLV431B LOW-VOLTAGE ADJUSTABLE PRECISION SHUNT REGULATOR SLVS139T − JULY 1996 − REVISED JUNE 2007 PARAMETER MEASUREMENT INFORMATION† CATHODE CURRENT vs CATHODE VOLTAGE CATHODE CURRENT vs CATHODE VOLTAGE 15 250 VKA = VREF TA = 25°C VKA = VREF TA = 25°C 200 10 I K − Cathode Current − µ A I K − Cathode Current − mA 150 5 0 −5 100 50 0 −50 −100 −150 −10 −200 −15 −1 −0.5 0 0.5 1 VKA − Cathode Voltage − V −250 −1 1.5 −0.5 0 0.
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TLV431, TLV431A, TLV431B LOW-VOLTAGE ADJUSTABLE PRECISION SHUNT REGULATOR SLVS139T − JULY 1996 − REVISED JUNE 2007 PARAMETER MEASUREMENT INFORMATION† RATIO OF DELTA REFERENCE VOLTAGE TO DELTA CATHODE VOLTAGE vs JUNCTION TEMPERATURE (for TLV431 and TLV431A) RATIO OF DELTA REFERENCE VOLTAGE TO DELTA CATHODE VOLTAGE vs JUNCTION TEMPERATURE (for TLV431B) 0.
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TLV431, TLV431A, TLV431B LOW-VOLTAGE ADJUSTABLE PRECISION SHUNT REGULATOR SLVS139T − JULY 1996 − REVISED JUNE 2007 PARAMETER MEASUREMENT INFORMATION EQUIVALENT INPUT NOISE VOLTAGE vs FREQUENCY 3V Vn − Equivalent Input Noise Voltage − nV/ Hz 350 VKA = VREF IK = 1 mA TA = 25°C 1 kΩ 300 470 µF + 250 TLV431 or TLV431A or TLV431B 200 750 Ω 2200 µF + 820 Ω TLE2027 + _ TP 160 kΩ 160 Ω TEST CIRCUIT FOR EQUIVALENT INPUT NOISE VOLTAGE 150 10 100 1k 10k 100k f − Frequency − Hz Figure 11 POST OFFICE
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TLV431, TLV431A, TLV431B LOW-VOLTAGE ADJUSTABLE PRECISION SHUNT REGULATOR SLVS139T − JULY 1996 − REVISED JUNE 2007 PARAMETER MEASUREMENT INFORMATION EQUIVALENT INPUT NOISE VOLTAGE OVER A 10-s PERIOD Vn − Equivalent Input Noise Voltage − µ V 10 f = 0.1 Hz to 10 Hz IK = 1 mA TA = 25°C 8 6 4 2 0 −2 −4 −6 −8 −10 0 2 4 6 8 10 t − Time − s 3V 1 kΩ 470 µF + 750 Ω 0.47 µF 2200 µF + 820 Ω TLV431 or TLV431A or TLV431B TLE2027 10 kΩ + _ 10 kΩ 1 µF 160 kΩ TLE2027 + _ 2.
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TLV431, TLV431A, TLV431B LOW-VOLTAGE ADJUSTABLE PRECISION SHUNT REGULATOR SLVS139T − JULY 1996 − REVISED JUNE 2007 PARAMETER MEASUREMENT INFORMATION 80 0° IK = 10 mA TA = 25°C 70 36° 60 72° 50 108° 40 144° 30 180° Phase Shift A V − Small-Signal Voltage Gain/Phase Margin − dB SMALL-SIGNAL VOLTAGE GAIN/PHASE MARGIN vs FREQUENCY Output IK 6.8 kΩ 180 Ω 10 µF 5V 4.
PAGE 16
TLV431, TLV431A, TLV431B LOW-VOLTAGE ADJUSTABLE PRECISION SHUNT REGULATOR SLVS139T − JULY 1996 − REVISED JUNE 2007 PARAMETER MEASUREMENT INFORMATION PULSE RESPONSE 1 3.5 3 Input and Output Voltage − V R = 18 kΩ TA = 25°C Input 18 kΩ Output 2.5 Ik 2 1.5 Pulse Generator f = 100 kHz Output 50 Ω 1 GND 0.5 0 TEST CIRCUIT FOR PULSE RESPONSE 1 −0.5 0 1 2 3 4 5 6 7 8 t − Time − µs Figure 15 PULSE RESPONSE 2 3.5 3 Input and Output Voltage − V R = 1.8 kΩ TA = 25°C Input 1.8 kΩ Output 2.
PAGE 17
TLV431, TLV431A, TLV431B LOW-VOLTAGE ADJUSTABLE PRECISION SHUNT REGULATOR SLVS139T − JULY 1996 − REVISED JUNE 2007 PARAMETER MEASUREMENT INFORMATION† STABILITY BOUNDARY CONDITION‡ (for TLV431B) STABILITY BOUNDARY CONDITION‡ (for TLV431 and TLV431A) 15 15 TA = 25°C IK = 15 mA Max VKA = VREF 12 9 Stable Stable VKA = 2 V 6 VKA = 3 V VKA = 3 V 0.1 1 TA = 25°C IK = 15 mA MAX For VKA = VREF , Stable for CL = 1 pF to 10k nF 0 0.001 10 0.
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TLV431, TLV431A, TLV431B LOW-VOLTAGE ADJUSTABLE PRECISION SHUNT REGULATOR SLVS139T − JULY 1996 − REVISED JUNE 2007 APPLICATION INFORMATION ~ VI 120 V − + P ~ VO 3.3 V P P Gate Drive VCC Controller VFB TLV431 or TLV431A or TLV431B Current Sense GND P P P P Figure 18. Flyback With Isolation Using TLV431, TLV431A, or TLV431B as Voltage Reference and Error Amplifier Figure 18 shows the TLV431, TLV431A, or TLV431B used in a 3.3-V isolated flyback supply.
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MECHANICAL DATA MSOT002A – OCTOBER 1994 – REVISED NOVEMBER 2001 LP (O-PBCY-W3) PLASTIC CYLINDRICAL PACKAGE 0.205 (5,21) 0.175 (4,44) 0.165 (4,19) 0.125 (3,17) DIA 0.210 (5,34) 0.170 (4,32) Seating Plane 0.157 (4,00) MAX 0.050 (1,27) C 0.500 (12,70) MIN 0.104 (2,65) FORMED LEAD OPTION 0.022 (0,56) 0.016 (0,41) 0.016 (0,41) 0.014 (0,35) STRAIGHT LEAD OPTION D 0.135 (3,43) MIN 0.105 (2,67) 0.095 (2,41) 0.055 (1,40) 0.045 (1,14) 1 2 3 0.105 (2,67) 0.080 (2,03) 0.105 (2,67) 0.
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MECHANICAL DATA MSOT002A – OCTOBER 1994 – REVISED NOVEMBER 2001 LP (O-PBCY-W3) PLASTIC CYLINDRICAL PACKAGE 0.539 (13,70) 0.460 (11,70) 1.260 (32,00) 0.905 (23,00) 0.650 (16,50) 0.610 (15,50) 0.020 (0,50) MIN 0.098 (2,50) 0.384 (9,75) 0.335 (8,50) 0.748 (19,00) 0.217 (5,50) 0.433 (11,00) 0.335 (8,50) 0.748 (19,00) 0.689 (17,50) 0.114 (2,90) 0.094 (2,40) 0.114 (2,90) 0.094 (2,40) 0.169 (4,30) 0.146 (3,70) DIA 0.266 (6,75) 0.234 (5,95) 0.512 (13,00) 0.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.com 11-Apr-2013 Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties.
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PACKAGE MATERIALS INFORMATION www.ti.com 1-Nov-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) TLV431ACDBVR SOT-23 DBV 5 3000 180.0 9.2 TLV431ACDBVT SOT-23 DBV 5 250 178.0 TLV431ACDBVT SOT-23 DBV 5 250 180.
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PACKAGE MATERIALS INFORMATION www.ti.com 1-Nov-2013 Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant TLV431BIDBVT SOT-23 DBV 5 250 179.0 8.4 3.2 3.2 1.4 4.0 8.0 Q3 TLV431BIDBZR SOT-23 DBZ 3 3000 178.0 9.2 3.08 2.8 1.27 4.0 8.0 Q3 TLV431BIDBZT SOT-23 DBZ 3 250 180.0 8.4 3.15 2.77 1.22 4.0 8.0 Q3 TLV431BIDCKR SC70 DCK 6 3000 179.0 8.4 2.2 2.5 1.2 4.0 8.
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PACKAGE MATERIALS INFORMATION www.ti.com 1-Nov-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) TLV431ACDBVR SOT-23 DBV 5 3000 205.0 200.0 33.0 TLV431ACDBVT SOT-23 DBV 5 250 180.0 180.0 18.0 TLV431ACDBVT SOT-23 DBV 5 250 205.0 200.0 33.0 TLV431ACDBZR SOT-23 DBZ 3 3000 202.0 201.0 28.0 TLV431AIDBVR SOT-23 DBV 5 3000 205.0 200.0 33.0 TLV431AIDBVT SOT-23 DBV 5 250 180.0 180.0 18.
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